Yeah, it is worth the upgrade. The expanded Intrada disc isn't a revelation, but the additional music is fine and it sounds great.
And if you don't like the synth approach fine, but that whole "the score is anachronistic to the period" is silly. Ben Hur's score is also anachronistic to the time period. So let's hate that one too, right ?
If you are a fan of this score, then this release is an excellent upgrade. The softer moments, especially the cue, "Someone I Know" really round out the album and make it an excellent listening experience. This still remains one of my favorite Jerry Goldsmith scores. Yes, the synth parts are cheesy and sometimes distracting, but the main theme is vintage Goldsmith. I was ecstatic to get the full score for this and the upgrade is highly recommended, but it all depends on how much you really like this score. I feel like the softer moments really help improve an already great score. Now bring on a complete Rudy!